Tourmaline is a borosilicate mineral (Al6B3Fe3H10NaO31Si6) rich in aluminum, iron, and sodium with a trigonal crystal structure.
Commonly black in color, it also has a wide range of colors in the rainbow depending on its chemical composition.Tourmaline has a unique property of being naturally polarized and able to generate voltage when heated, which has been used by chemists and jewelers since its discovery in the 19th century as a consistent source of polarized light in research and gem polishing.
This item is approximately 9" x 8" 9lbs 6oz.
Shipping cost is based on weight. Just add products to your cart and use the Shipping Calculator to see the shipping price.
We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.